Radirgy is a vertical-screen top-down bullet-hell shooter with bright, cartoony, cel-shaded graphics. The game follows the story of a young hero who must pilot one of three different mecha-ships to save the world from an evil alien threat.
The gameplay revolves around shooting down waves of enemies while navigating through increasingly difficult levels. Each ship has unique abilities such as a spread-gun, a weak homing laser, or a slow but powerful bubble gun, which can be used strategically to take down enemies and bosses.